CN116278852A - Automobile charging thermal management control method, system, electronic equipment and storage medium - Google Patents

Automobile charging thermal management control method, system, electronic equipment and storage medium Download PDF

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Publication number
CN116278852A
CN116278852A CN202310276880.4A CN202310276880A CN116278852A CN 116278852 A CN116278852 A CN 116278852A CN 202310276880 A CN202310276880 A CN 202310276880A CN 116278852 A CN116278852 A CN 116278852A
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China
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cooling
charging
temperature
current
cooling liquid
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CN202310276880.4A
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Chinese (zh)
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潘志强
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Lantu Automobile Technology Co Ltd
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Lantu Automobile Technology Co Ltd
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Priority to CN202310276880.4A priority Critical patent/CN116278852A/en
Publication of CN116278852A publication Critical patent/CN116278852A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/302—Cooling of charging equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides an automobile charging thermal management control method, an automobile charging thermal management control system, electronic equipment and a storage medium, wherein the method comprises the following steps: when charging is started, namely the output current capacity of the charging pile is identified, the corresponding cooling grade is determined, and the duty ratio of the cooling liquid water pump is comprehensively determined according to the ambient temperature, so that the high-power quick charging is pre-cooled in advance.

Description

Automobile charging thermal management control method, system, electronic equipment and storage medium
Technical Field
The invention relates to the field of electric automobile charging, in particular to an automobile charging thermal management control method, an automobile charging thermal management control system, electronic equipment and a storage medium.
Background
With the development of electric vehicles, the high-power quick charging technology of the electric vehicles becomes a development trend, and the high-power quick charging brings good charging use experience to users by quickly improving the charging rate. The current high-power quick charge is realized by improving a voltage platform and improving charging current, so that the quick charge capacity of 600A is achieved, the direct current quick charge in the market is generally not more than 250A, when the charging current is improved to 600A, heat is increased, and thus the pressure is brought to the whole vehicle thermal management system. In addition, the current quick charging system only detects the temperature of the junction of the high-voltage wire harness in the charging seat, and the junction of the high-voltage wire harness and the battery pack is a blind zone, so that when the charging current is increased, the junction of the high-voltage wire harness and the battery pack is possibly overheated or even at risk of fire, and the temperature monitoring and the protection are needed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an automobile charging thermal management control method, an automobile charging thermal management control system, electronic equipment and a storage medium.
According to a first aspect of the present invention, there is provided an automobile charging heat management control method, including:
s1, acquiring the maximum output current capacity of a charging pile when charging is started;
s2, determining a cooling grade of a cooling system according to the maximum output current capacity of the charging pile;
s3, acquiring the current environment temperature, and controlling the duty ratio of a cooling liquid water pump according to the cooling grade and the current environment temperature;
and S4, collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
On the basis of the technical scheme, the invention can also make the following improvements.
Preferably, determining the cooling level of the cooling system according to the maximum output current capability of the charging pile in step S2 includes:
setting a corresponding relation between a cooling grade of a cooling system and a maximum output current capacity interval range of a charging pile;
and determining the cooling grade of the cooling system corresponding to the maximum output current capacity of the charging pile according to the interval range in which the maximum output current capacity of the charging pile falls.
Preferably, determining a cooling level of the cooling system corresponding to the maximum output current capability of the charging pile according to the range of the interval within which the maximum output current capability of the charging pile falls, includes:
when the maximum output current capacity of the charging pile is smaller than 250A, determining that the cooling Level of the cooling system is Level1;
when the maximum output current capacity of the charging pile is between 250A and 400A, determining the cooling Level of the cooling system to be Level2;
and when the maximum output current capacity of the charging pile is 400-600A, determining the cooling Level of the cooling system to be Level3.
Preferably, step S3 of controlling the duty cycle of the coolant pump according to the cooling level and the current ambient temperature includes:
setting a corresponding relation between the duty ratio of the cooling liquid water pump and the cooling grade and a corresponding relation between the duty ratio of the cooling liquid water pump and the current environment temperature interval range;
and determining the duty ratio of the cooling liquid water pump corresponding to the cooling grade and the current environment temperature according to the range of the interval in which the cooling grade and the current environment temperature fall.
Preferably, determining the duty ratio of the coolant pump corresponding to the cooling level and the current ambient temperature according to the range of the interval in which the cooling level and the current ambient temperature fall includes:
when the cooling Level of the cooling system is Level1 and the current ambient temperature is less than 45 ℃, controlling the duty ratio of the cooling liquid water pump to be 80%;
when the cooling Level of the cooling system is Level1 and the current ambient temperature is more than 45 ℃, controlling the duty ratio of the cooling liquid water pump to be 100%;
and when the cooling Level of the cooling system is Level2 or Level3, controlling the duty ratio of the cooling liquid water pump to be 100%.
Preferably, in step S4, controlling the power of the air conditioner compressor according to the temperature of the cooling liquid includes:
setting a corresponding relation between the power of an air conditioner compressor and the temperature interval range of the cooling liquid;
and determining the power of the air conditioner compressor corresponding to the temperature of the cooling liquid according to the range of the interval in which the temperature of the cooling liquid falls.
Preferably, the determining the power of the air conditioner compressor corresponding to the temperature of the cooling liquid according to the range of the interval in which the temperature of the cooling liquid falls includes:
when the temperature of the cooling liquid is lower than 40 ℃, controlling the power of the air conditioner compressor to be 0kw;
when the temperature of the cooling liquid is between 40 ℃ and 50 ℃, controlling the power of the compressor to be 4kw;
and controlling the power of the compressor to be 7kw when the temperature of the cooling liquid is higher than 50 ℃.
Preferably, after step S4, the method further comprises:
s5, in the charging process, collecting the positive temperature T1 and the negative temperature T2 of the high-voltage wire harness inside the quick-charging connector on the battery pack, and the positive temperature T3 and the negative temperature T4 of the high-voltage wire harness at the quick-charging seat end, and adjusting charging current according to the collected temperatures T1, T2, T3 and T4.
Preferably, the adjusting the charging current according to the collected temperatures T1, T2, T3 and T4 specifically includes:
when any one of the temperatures T1, T2, T3 and T4 is higher than 120 ℃, stopping charging and protecting, and reinserting the gun;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 95 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.8 times of the current charging current;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 105 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.5 times of the current charging current;
and when the temperatures T1, T2, T3 and T4 are lower than 90 ℃, normal charging is restored, and derating is not performed.
According to a second aspect of the present invention, there is provided an automotive charging thermal management control system comprising: the whole vehicle control system and the battery management system,
the whole vehicle control system is used for acquiring the maximum output current capacity of the charging pile when charging is started;
the battery management system is used for acquiring the maximum output current capacity of the charging pile sent by the whole vehicle control system, determining the cooling grade of the cooling system according to the maximum output current capacity, and sending a cooling grade request to the whole vehicle control system;
the whole vehicle control system is also used for receiving the cooling grade request sent by the battery management system, acquiring the current environment temperature from the air conditioner controller, controlling the duty ratio of the water pump according to the cooling grade and the current environment temperature, collecting the temperature of cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor for implementing the steps of the automobile charge thermal management control method as described above when executing a computer management class program stored in the memory.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer management class program which, when executed by a processor, implements the steps of the above automobile charging thermal management control method.
According to the automobile charging heat management control method, the system, the electronic equipment and the storage medium, aiming at high-power quick charging, particularly a high-current charging technology exceeding 250A, such as a 600A quick technology, before charging, corresponding cooling grades are predetermined by obtaining the maximum output current capacity of a charging pile, and the water pump duty ratio is further determined according to the determined cooling grades and the environment temperature, so that early cooling is realized, the power of an air conditioner compressor is controlled by the temperature of cooling liquid in the charging process, and a good heat protection effect is achieved in the quick charging process; on the other hand, the invention also monitors the temperature of the battery pack quick-charging connector, and prevents the connector from over-high temperature and even fire.
Drawings
FIG. 1 is a flow chart of a method for controlling the thermal management of automobile charging;
fig. 2 is a schematic diagram of a charging system architecture according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an automotive charging thermal management control system according to an embodiment of the present invention;
fig. 4 is a schematic hardware structure of one possible electronic device according to the present invention;
fig. 5 is a schematic hardware structure of a possible computer readable storage medium according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. In addition, the technical features of each embodiment or the single embodiment provided by the invention can be combined with each other at will to form a feasible technical scheme, and the combination is not limited by the sequence of steps and/or the structural composition mode, but is necessarily based on the fact that a person of ordinary skill in the art can realize the combination, and when the technical scheme is contradictory or can not realize, the combination of the technical scheme is not considered to exist and is not within the protection scope of the invention claimed.
Fig. 1 is a flowchart of an automobile charging thermal management control method provided by the invention, as shown in fig. 1, the automobile charging thermal management control method mainly includes the following steps:
s1, when charging is started, obtaining the maximum Output Current capacity CML_Max_output_Current of the charging pile.
It CAN be understood that the present invention may acquire the maximum Output Current cml_max_output_current of the charging pile in various manners, such as the whole vehicle control system (VCU) acquiring the maximum Output Current capacity cml_max_output_current of the charging pile through the fast charging CAN, and the Battery Management System (BMS) acquiring the maximum Output Current capacity cml_max_output_current of the charging pile sent by the VCU through the whole vehicle CAN.
S2, determining the cooling grade according to the maximum Output Current CML_Max_output_Current.
It can be understood that when charging is started, that is, the corresponding cooling grade is determined according to the obtained maximum Output Current cml_max_output_current of the charging pile, compared with the prior art that the cooling is performed when the temperature of the cooling liquid is increased in the charging process, the method can prevent the temperature of the cooling liquid from being too high in advance and control the temperature of the cooling liquid to be in a proper range, thus being applicable to a high-power quick charging process with relatively quick temperature rise, in addition, the method does not limit the specific corresponding relation between the maximum Output Current cml_max_output_current and the cooling grade, a person skilled in the art can set a corresponding relation between a cooling level of a cooling system and a maximum Output Current capacity interval range of a charging pile according to actual use, and determine the cooling level of the cooling system corresponding to the maximum Output Current capacity of the charging pile according to the interval range in which the maximum Output Current capacity of the charging pile falls, but as a preferred mode, for the maximum Output Current of the charging pile of 250A-600A commonly adopted in the prior art, the following corresponding relation between the maximum Output Current cml_max_output_current and the cooling level is adopted in the invention:
when the maximum Output Current CML_Max_output_Current is smaller than 250A, determining the cooling Level as Level1;
when the maximum Output Current CML_Max_output_Current is between 250A and 400A, determining the cooling Level as Level2;
when the maximum Output Current cml_max_output_current is between 400A and 600A, the cooling Level is determined to be Level3.
S3, acquiring the current environment temperature, and controlling the duty ratio of a cooling liquid water pump according to the cooling grade and the current environment temperature;
it can be understood that the cooling efficiency of the cooling liquid is also affected by the ambient temperature, the lower the ambient temperature is, the higher the cooling efficiency of the cooling liquid is, therefore, the influence of the ambient temperature on the cooling liquid is considered in the invention, meanwhile, the flow rate of the cooling liquid can be adjusted by adjusting the duty ratio of the cooling liquid pump, therefore, the invention jointly controls the duty ratio of the cooling liquid pump through the cooling grade determined in the step S2 and the acquired ambient temperature, thereby realizing the control of the flow rate of the cooling liquid, specifically, the following correspondence between the cooling liquid pump duty ratio and the cooling grade and the correspondence between the cooling liquid pump duty ratio and the current ambient temperature interval range are set according to the actual use, and the cooling liquid pump duty ratio corresponding to the cooling grade and the current ambient temperature is determined according to the interval range in which the cooling grade and the current ambient temperature fall, but as a preferable mode, for the conventional cooling liquid pump, the invention adopts the following correspondence between the cooling grade and the ambient temperature and the cooling liquid pump duty ratio:
when the cooling Level is Level1 and the ambient temperature is less than 45 ℃, controlling the duty ratio of the water pump to be 80%;
when the cooling grade is Level1, determining that the ambient temperature is more than 45 ℃, and controlling the duty ratio of the water pump to be 100%;
and when the cooling Level is Level2 or Level3, controlling the duty ratio of the water pump to be 100%.
And S4, collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
It can be understood that in the charging process, the invention also collects the temperature of the cooling liquid in real time, and controls the power of the air conditioner compressor according to the real-time temperature of the cooling liquid, so as to control the temperature of the cooling liquid in a proper range, such as below 40 ℃, the invention does not limit the corresponding relation between the temperature of the cooling liquid and the power of the air conditioner compressor, and a person skilled in the art can set the corresponding relation between the power of the air conditioner compressor and the temperature interval range of the cooling liquid according to actual use, and determine the power of the air conditioner compressor corresponding to the temperature of the cooling liquid according to the interval range in which the temperature of the cooling liquid falls, but as a preferable mode, for the conventional cooling liquid and the air conditioner compressor, the invention adopts the following corresponding relation between the temperature of the cooling liquid and the power of the air conditioner compressor:
when the temperature of the cooling liquid is lower than 40 ℃, controlling the power of an air conditioner compressor to be 0kw;
when the temperature of the cooling liquid is between 40 ℃ and 50 ℃, controlling the power of an air conditioner compressor to be 4kw;
when the temperature of the cooling liquid is higher than 50 ℃, controlling the power of an air conditioner compressor to be 7kw;
wherein 7kw is the maximum power of the air conditioner compressor.
As a further preferred embodiment, in the prior art, the fast charging system only detects the temperature of the connection part of the high-voltage wire harness in the charging seat, however, in the actual charging process, the connection port of the high-voltage wire harness to the battery pack is also a region with higher temperature, and the region is also provided with risks of overheat and fire, especially for high-power fast charging, the risks of overheat and fire are further increased, so that the temperature detection of the fast charging connector is further increased on the basis of the existing charging system architecture, specifically, as shown in fig. 2, the temperature sensors PTC1 and PTC2 are arranged inside the fast charging connector above the battery pack, the Battery Management System (BMS) respectively collects the temperatures T1 and T2 of the positive electrode and the negative electrode inside the fast charging connector above the battery pack, meanwhile, the temperature sensors PTC3 and PTC4 are also arranged at the fast charging seat end, the temperatures T3 and T4 of the high-voltage wire harness at the fast charging seat end are respectively collected by the Battery Management System (BMS), the temperature sensors PTC3 and PTC4 are alternately collected by the fast charging seat end and the fast charging controller (VCU) and the full-charge controller through the VCU and the full-charge Controller (CAN) and the full-charge controller are alternately connected to the high-voltage wire harness and the full-charge vehicle (CAN) through the positive and the full-charge controller through the VCU.
Based on the charging system architecture, in order to further control the heating fire risk in the charging process, the automobile charging heat management control method further comprises the following steps:
s5, in the charging process, collecting the positive temperature T1 and the negative temperature T2 of the high-voltage wire harness inside the quick-charging connector on the battery pack, and the positive temperature T3 and the negative temperature T4 of the high-voltage wire harness at the quick-charging seat end, and adjusting charging current according to the collected temperatures T1, T2, T3 and T4.
It CAN be understood that based on the charging system architecture shown in fig. 2, temperatures T1 and T2 of the positive pole and the negative pole of the high-voltage harness inside the quick-charging connector and temperatures T3 and T4 of the positive pole and the negative pole of the high-voltage harness at the quick-charging seat end are obtained respectively by the Vehicle Controller (VCU), and the Vehicle Controller (VCU) further controls charging current of the charging pile according to the temperatures T1, T2, T3 and T4, wherein the temperatures T1 and T2 of the positive pole and the negative pole of the high-voltage harness inside the quick-charging connector are collected by the Battery Management System (BMS) and transmitted to the Vehicle Controller (VCU) by the vehicle CAN, and the temperatures T3 and T4 of the positive pole and the negative pole of the high-voltage harness at the quick-charging seat end are transmitted to the Vehicle Controller (VCU) by the quick-charging CAN. The above temperature collection mode is only one embodiment of the present invention, the present invention is not limited to a specific temperature collection mode, and a person skilled in the art may collect and transmit the corresponding temperature value through other sensors and circuits. In addition, the present invention is not limited to a specific adjustment method for adjusting the charging current according to the collected temperatures T1, T2, T3, and T4, and a person skilled in the art may appropriately select the adjustment method according to the temperature change conditions of the temperatures T1, T2, T3, and T4 in actual use, but as a preferred method, the present invention adopts the following adjustment method for the existing charging pile and charging current:
when any one of the temperatures T1, T2, T3 and T4 is higher than 120 ℃, stopping charging protection is carried out, and even if the temperature is reduced, the charging is not automatically recovered any more, and the gun must be plugged in and pulled out again;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 95 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.8 times of the current charging current;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 105 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.5 times of the current charging current;
and when the temperatures T1, T2, T3 and T4 are lower than 90 ℃, normal charging is recovered, and derating is not performed.
It will be appreciated that the above-described regulation may be a continuous process, such as when any one of T1, T2, T3, T4 is above 105℃, for example 110℃, and the current is I 0 According to the above regulation, the current charging should be performed, and the charging current should be reset to 0.5 times the present charging current, i.e. the charging current is set to 0.5I 0 Then, the temperature sensors PTC1, PTC2, PTC3, PTC4 are continuously monitored, and the temperatures T1, T2, T3, T4 of the temperature sensors T1, T2, T3, T4 are reduced due to the reduction of the charging current, when the temperatures T1, T2, T3, T4 are lower than 105 ℃ and at least one of T1, T2, T3, T4 is higher than 95 ℃, for example 100 ℃, the charging current is reset by 0.5 times of the current charging current according to the regulation mode, namely the charging current is set to be 0.4I 0 Then continuously monitoring the temperatures T1, T2, T3 and T4 of the temperature sensors PTC1, PTC2, PTC3 and PTC4, further reducing the temperatures T1, T2, T3 and T4 due to the reduction of the charging current, and restoring normal charging without derating when the temperatures T1, T2, T3 and T4 are lower than 95 ℃, such as 90 ℃, i.e. adopting I again 0 Is charged by the current of (a). Of course, the above-mentioned manner is merely an example of the present invention, and in actual use, the temperatures T1, T2, T3, T4 may not be higher than 105 ℃, for example, only 100 ℃, thenThe charging current should be set to be general to the present charging current and then charging with the original charging current is continued when the temperatures T1, T2, T3, T4 are reduced below 95 deg.c.
Based on the defects in the background technology, the embodiment of the invention provides an automobile charging thermal management control method. Compared with the prior art, the invention recognizes the output current capacity of the charging pile when charging is started, determines the corresponding cooling grade, comprehensively determines the duty ratio of the cooling liquid water pump according to the ambient temperature, thereby realizing the advanced pre-cooling of high-power quick charging.
Fig. 3 is a schematic diagram of an automobile charging thermal management control system according to the present invention, and as shown in fig. 3, the automobile charging thermal management control system according to the present invention mainly includes: whole car control system VCU and battery management system BMS, wherein:
the vehicle control system VCU is used for acquiring the maximum Output Current capacity CML_Max_output_Current of the charging pile when charging is started;
the battery management system BMS is used for acquiring the maximum Output Current capacity CML_Max_output_current of the charging pile sent by the vehicle control system VCU, determining a cooling grade according to the maximum Output Current capacity CML_Max_output_current, and sending a cooling grade request to the vehicle control system VCU;
the vehicle control system VCU is also used for receiving the cooling grade request sent by the battery management system BMS, acquiring the ambient temperature from the air conditioner controller, controlling the duty ratio of the water pump according to the cooling grade and the ambient temperature, collecting the temperature of cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
As an preferable embodiment, the vehicle control system VCU of the present invention is further configured to collect temperatures T1 and T2 of the positive electrode and the negative electrode of the high-voltage harness inside the quick-charging connector on the battery pack and temperatures T3 and T4 of the positive electrode and the negative electrode of the high-voltage harness at the quick-charging seat end, respectively, and adjust the charging current according to the collected temperatures T1, T2, T3 and T4.
It can be understood that the automobile charging thermal management control system provided by the present invention corresponds to the automobile charging thermal management control method provided by the foregoing embodiments, and relevant technical features of the automobile charging thermal management control system may refer to relevant technical features of the automobile charging thermal management control method, which are not described herein.
Referring to fig. 4, fig. 4 is a schematic diagram of an embodiment of an electronic device according to an embodiment of the invention. As shown in fig. 4, an embodiment of the present invention provides an electronic device, including a memory 410, a processor 420, and a computer program 411 stored in the memory 410 and executable on the processor 420, wherein the processor 420 executes the computer program 411 to implement the following steps:
s1, when charging is started, obtaining the maximum Output Current capacity CML_Max_output_Current of a charging pile;
s2, determining a cooling grade according to the maximum Output Current capacity CML_Max_output_Current;
s3, acquiring an ambient temperature, and controlling the duty ratio of a cooling liquid water pump according to the cooling grade and the ambient temperature;
and S4, collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
As a preferred embodiment, the computer program 311, when executed, also implements the steps of:
s5, in the charging process, collecting the positive temperature T1 and the negative temperature T2 of the high-voltage wire harness inside the quick-charging connector on the battery pack, and the positive temperature T3 and the negative temperature T4 of the high-voltage wire harness at the quick-charging seat end, and adjusting charging current according to the collected temperatures T1, T2, T3 and T4.
Referring to fig. 5, fig. 5 is a schematic diagram of an embodiment of a computer readable storage medium according to the present invention. As shown in fig. 5, the present embodiment provides a computer-readable storage medium 500 having stored thereon a computer program 511, which computer program 511 when executed by a processor implements the steps of:
s1, when charging is started, obtaining the maximum Output Current capacity CML_Max_output_Current of a charging pile;
s2, determining a cooling grade according to the maximum Output Current capacity CML_Max_output_Current;
s3, acquiring an ambient temperature, and controlling the duty ratio of a cooling liquid water pump according to the cooling grade and the ambient temperature;
and S4, collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
As a preferred embodiment, the computer program 411, when executed, also implements the following steps:
s5, in the charging process, collecting the positive temperature T1 and the negative temperature T2 of the high-voltage wire harness inside the quick-charging connector on the battery pack, and the positive temperature T3 and the negative temperature T4 of the high-voltage wire harness at the quick-charging seat end, and adjusting charging current according to the collected temperatures T1, T2, T3 and T4.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. The automobile charging thermal management control method is characterized by comprising the following steps of:
s1, acquiring the maximum output current capacity of a charging pile when charging is started;
s2, determining a cooling grade of a cooling system according to the maximum output current capacity of the charging pile;
s3, acquiring the current environment temperature, and controlling the duty ratio of a cooling liquid water pump according to the cooling grade and the current environment temperature;
and S4, collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid.
2. The method according to claim 1, wherein determining the cooling level of the cooling system according to the maximum output current capacity of the charging pile in step S2 comprises:
setting a corresponding relation between a cooling grade of a cooling system and a maximum output current capacity interval range of a charging pile;
and determining the cooling grade of the cooling system corresponding to the maximum output current capacity of the charging pile according to the interval range in which the maximum output current capacity of the charging pile falls.
3. The method according to claim 2, wherein determining a cooling system cooling level corresponding to the maximum output current capacity of the charging pile according to a range of intervals within which the maximum output current capacity of the charging pile falls comprises:
when the maximum output current capacity of the charging pile is smaller than 250A, determining that the cooling Level of the cooling system is Level1;
when the maximum output current capacity of the charging pile is between 250A and 400A, determining the cooling Level of the cooling system to be Level2;
and when the maximum output current capacity of the charging pile is 400-600A, determining the cooling Level of the cooling system to be Level3.
4. The method according to claim 1, wherein controlling the duty ratio of the coolant pump according to the cooling level and the current ambient temperature in step S3 includes:
setting a corresponding relation between the cooling grade, the current ambient temperature interval range and the duty ratio of the cooling liquid water pump;
and determining the duty ratio of the cooling liquid water pump corresponding to the cooling grade and the current environment temperature according to the range of the interval in which the cooling grade and the current environment temperature fall.
5. The method according to claim 4, wherein determining the cooling liquid pump duty ratio corresponding to the cooling level and the current ambient temperature according to the range of the interval in which the cooling level and the current ambient temperature fall, comprises:
when the cooling Level of the cooling system is Level1 and the current ambient temperature is less than 45 ℃, controlling the duty ratio of the cooling liquid water pump to be 80%;
when the cooling Level of the cooling system is Level1 and the current ambient temperature is more than 45 ℃, controlling the duty ratio of the cooling liquid water pump to be 100%;
and when the cooling Level of the cooling system is Level2 or Level3, controlling the duty ratio of the cooling liquid water pump to be 100%.
6. The method according to claim 1, wherein the controlling the power of the air conditioner compressor according to the temperature of the cooling liquid in step S4 comprises:
setting a corresponding relation between the power of an air conditioner compressor and the temperature interval range of the cooling liquid;
and determining the power of the air conditioner compressor corresponding to the temperature of the cooling liquid according to the range of the interval in which the temperature of the cooling liquid falls.
7. The method of claim 6, wherein determining the power level of the air conditioner compressor corresponding to the coolant temperature according to the range of the interval in which the coolant temperature falls, comprises:
when the temperature of the cooling liquid is lower than 40 ℃, controlling the power of the air conditioner compressor to be 0kw;
when the temperature of the cooling liquid is between 40 ℃ and 50 ℃, controlling the power of the compressor to be 4kw;
and controlling the power of the compressor to be 7kw when the temperature of the cooling liquid is higher than 50 ℃.
8. The method according to claim 1, characterized by further comprising, after step S4:
s5, in the charging process, collecting the positive temperature T1 and the negative temperature T2 of the high-voltage wire harness inside the quick-charging connector on the battery pack, and the positive temperature T3 and the negative temperature T4 of the high-voltage wire harness at the quick-charging seat end, and adjusting charging current according to the collected temperatures T1, T2, T3 and T4.
9. The method for controlling thermal management of charging of an automobile according to claim 8, wherein said adjusting the charging current according to the collected temperatures T1, T2, T3 and T4 comprises:
when any one of the temperatures T1, T2, T3 and T4 is higher than 120 ℃, stopping charging and protecting, and reinserting the gun;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 95 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.8 times of the current charging current;
when at least one of the temperatures T1, T2, T3 and T4 is higher than 105 ℃, carrying out current-reducing charging, and resetting the charging current according to 0.5 times of the current charging current;
and when the temperatures T1, T2, T3 and T4 are lower than 90 ℃, normal charging is restored, and derating is not performed.
10. An automotive charging thermal management control system, comprising: the vehicle control system and the battery management system;
the whole vehicle control system is used for acquiring the maximum output current capacity of the charging pile when charging is started; the system is also used for receiving the cooling grade request sent by the battery management system, acquiring the current environment temperature from an air conditioner controller and controlling the duty ratio of the water pump according to the cooling grade and the current environment temperature; collecting the temperature of the cooling liquid in the charging process, and controlling the power of the air conditioner compressor according to the temperature of the cooling liquid;
and the battery management system is used for acquiring the maximum output current capacity of the charging pile sent by the whole vehicle control system, determining the cooling grade of the cooling system according to the maximum output current capacity, and sending a cooling grade request to the whole vehicle control system.
CN202310276880.4A 2023-03-16 2023-03-16 Automobile charging thermal management control method, system, electronic equipment and storage medium Pending CN116278852A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117002296A (en) * 2023-09-18 2023-11-07 广东天枢新能源科技有限公司 Liquid cooling variable flow control method and system for charging pile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117002296A (en) * 2023-09-18 2023-11-07 广东天枢新能源科技有限公司 Liquid cooling variable flow control method and system for charging pile
CN117002296B (en) * 2023-09-18 2024-04-12 广东天枢新能源科技有限公司 Liquid cooling variable flow control method and system for charging pile

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